+static int
+ioctl_fd_maybe_socket (const struct fd_hook *remaining_list,
+ gl_ioctl_fn primary,
+ int fd, int request, void *arg)
+{
+ SOCKET sock;
+ WSANETWORKEVENTS ev;
+
+ /* Test whether fd refers to a socket. */
+ sock = FD_TO_SOCKET (fd);
+ ev.lNetworkEvents = 0xDEADBEEF;
+ WSAEnumNetworkEvents (sock, NULL, &ev);
+ if (ev.lNetworkEvents != 0xDEADBEEF)
+ {
+ /* fd refers to a socket. */
+ if (ioctlsocket (sock, request, arg) < 0)
+ {
+ set_winsock_errno ();
+ return -1;
+ }
+ else
+ return 0;
+ }
+ else
+ /* Some other type of file descriptor. */
+ return execute_ioctl_hooks (remaining_list, primary, fd, request, arg);
+}
+
+static struct fd_hook fd_sockets_hook;